Get the best quality water filter replacements with this pack of two Reverse Osmosis PAC and RO filters. These filters should fit Vortopt and GS4 systems along with most under the sink straight insert (see pictures to view filter connection type) filter systems. The first image should show details for each filter. They use the Reverse Osmosis method to ensure the cleanest water possible. Get the best water filtration for your home with this Water Filter Pack. Please let us know if there are any questions. Thanks
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